1.A sample of 243 students rated their math textbook on a scale from one to seven. The average rating was 4.63, and the standard deviation was 0.82.

a)Construct a 95% confidence interval for the mean score, and write it in interval form.

b) sentence that explains the interval from part a), using the numbers from part a).

c)Write the confidence interval in "point estimate + margin of error" form.